One can enlist children when the parents belong to a faith community. When they are 15 they can choose themselves according to law. There has been no reports whatsoever in the press that this is a move on part of the government.
This is an excerpt from their annual report written to the authorities:
In 2009, the religious community that we are from 2010 will only apply for grants for the baptized members. Reason for this change is that we want to do it the same way in Norway that Jehovah's Witnesses do elsewhere around the world, although we are aware that in accordance with Norwegian law we also have the opportunity to count non-baptized persons as members, as we have done until now. The new practice means, for example, that we no longer make use of the opportunity to to include children of baptized members as eligible members..